Four policemen stood guard over the single-file line.    From Wordnik.com.  [Job Fight: Immigrants vs. Locals] Reference

"But that would account for only a single-file line of -".    From Wordnik.com.  [The Source of Magic]

The way was so narrow that they had to proceed single-file.    From Wordnik.com.  [Temple of the Winds]

Several men and women walked out onto the porch single-file.    From Wordnik.com.  [When the Wind Blows]

Several young girls all under age twelve were lined up single-file.    From Wordnik.com.  [Natalia Brzezinski: A Food Hater's Manifesto] Reference

The warriors made four single-file lines and started into the gully.    From Wordnik.com.  [Riverwind the Plainsman]

To begin boarding, listen up for your zone and form a single-file line.    From Wordnik.com.  [Booking a Trip to Greener Pastures] Reference

It was large enough and wide enough for Tran to enter only in single-file.    From Wordnik.com.  [Mission to Moulokin]

Television footage showed rescuers walking single-file up a mountain trail.    From Wordnik.com.  [Airbus crashes near Islamabad; all 152 aboard killed, including 2 Americans] Reference

Visitor flow is impeded by the too-narrow staircase (single-file, both ways).    From Wordnik.com.  [A Modern Wing Takes Flight] Reference

When they walked out, they walked in two single-file lines, following each other.    From Wordnik.com.  [CNN Transcript - Breaking News: Gunman Fires on Another San Diego School - March 22, 2001] Reference

It wasn't so bad when they marched past, single-file, during the gravedigger's scene.    From Wordnik.com.  [Jennifer Ouellette: 10 Things I Hate About Hamlet] Reference

Spiny lobsters have the habit of walking on the sea bed in long, single-file marches.    From Wordnik.com.  [Mark C. Miller: Holy Mackerel! Amazing Fish Facts] Reference

Eventually they were evacuated, single-file, onto a platform and then out of the subway.    From Wordnik.com.  [The 'Silver Fox' Unplugged] Reference

A curved, single-file chute mimicked the cattle's natural tendency to follow each other.    From Wordnik.com.  [Life Among the 'Yakkity Yaks'] Reference

With the configuration of the final kilometer, the finish favors a single-file team lead-out.    From Wordnik.com.  [Contador withstands challenge from Schleck, defends yellow, as Cancellara wins Tour de France TT stage] Reference

There was no sidewalk, so Maureen and Clark strode single-file and as close to the curb as possible.    From Wordnik.com.  [Anniversary Dinner at Denny's] Reference

They crossed a narrow bridge, single-file, and the gate was closed after them by a silent guardsman.    From Wordnik.com.  [Spirit Gate] Reference

If Batista's army was 400 strong, they'd wait until they were marching single-file before attacking.    From Wordnik.com.  [Fidel Castro, My Life - Chapter 9: Lessons from a Guerrilla War] Reference

"We ought to know this door when we see it, because it'll be big, unless they go through single-file.".    From Wordnik.com.  [The Dark Tower]

We were lined up, single-file, on the permaplast sidewalk that connected the billet and the supply hut.    From Wordnik.com.  [The Forever War]

But I will tell you, there have been a number, a large number of people coming out in single-file lines.    From Wordnik.com.  [CNN Transcript Dec 12, 2006] Reference

Like circus elephants, the two women sauntered single-file through the cramped displays of Bearly Yours.    From Wordnik.com.  [A Corpse is a Corpse]

Throw down your weapons and come single-file through the front door or suffer the immediate consequences!.    From Wordnik.com.  [Black Blade]

You realize, of course, that we will have to ride single-file on the worst sections of the Breakneck track.    From Wordnik.com.  [Conqueror's Moon]

The trail they rode now, although they had to go single-file, was far from the goat track Pol had first seen.    From Wordnik.com.  [Brightly Burning]

These two lines would enter the back doors of the Cologne train station and cross through the station single-file.    From Wordnik.com.  [Archive 2009-07-01] Reference

Gomez, still in the uniform he'd borrowed from the sky liner android, was at the head of the single-file procession.    From Wordnik.com.  [Tek Money]

Out in the driveway there was a steady single-file stream of infected people who were arriving from around the globe.    From Wordnik.com.  [Invasion]

The entire Pantheon had then gone single-file through a Veil of Heaven to a room Forrester just couldn't remember fully.    From Wordnik.com.  [Pagan Passions] Reference

I mean, if you had organized people in a single-file line, there is simply no way they would have broken down this door.    From Wordnik.com.  [CNN Transcript Dec 1, 2008] Reference

What motivates me are the words in my head that struggle to march single-file onto a page to form stories I want to tell.    From Wordnik.com.  [Marcia DeSanctis: Age, Writing and Workshops] Reference

And what it has soon in preliminary runs in practice sessions is more passing, less single-file racing, more lead changes.    From Wordnik.com.  [CNN Transcript - Sunday Morning News: NASCAR Officials Hope New Features on Cars Will Increase Speeds and Passing at Daytona 500 - February 18, 2001] Reference

It's barely wide enough for two people to walk abreast; quite a few people pass us as we march single-file along one wall.    From Wordnik.com.  [A King of Infinite Space]

I just dove in, and headed north, along with, I noticed then, a steady single-file stream of others trying to do the same thing.    From Wordnik.com.  [Suz Redfearn: Inauguration, Orange] Reference

The cops were in the alley, single-file; the men manning the barricade were already swinging it aside to let a patrol car through.    From Wordnik.com.  [Black Blade]

The wire was set up so that Iraqi women would be forced to stand in a near single-file line, or risk being injured on the concertina wire.    From Wordnik.com.  [Iraq War Veteran James Circello: All Out on March 21] Reference